Automatic temperature-regulator for water-heaters.



No. 662,092. Patented Nov. 20, I900.

' A. ROESCH.

AUTOMATIC TEMPERATURE REGULATOR FOR WATER HEATERS.

(Application filed June 7, 1897. (No Model.)

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ilNirno TATES ATENT OFFICEQ ALFRED ROESCH, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE DAVIS & ROESCH TEMPERATURE CONTROLLING COMPANY, OF NEW JERSEY.

AUTOMATIC TEMPERATURE-REGULATOR FOR WATER-HEATERS.

SPECIFICATION formingpart of Letters ia'tent No. 662,092, dated November 20, 1900.

Application filed June '7, 1897. Serial 110.639,?57. (No model.)

To ctZZ whom it may concern:

Be it known that I, ALFRED Ronson, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented new and useful Improvements in Automatic Temperature- Regulators for Water-Heaters, of which the following is a specification.

My invention relates to improvements in devices for automatically regulating the temperature of water used in so-called waterheaters.

The construction of my device is explained by reference to the accompanying drawing, which represents a side view thereof, part in section.

The respective parts are referred to by reference-letters.

A represents a tank connected with an ordinary city water-supply under pressure, in which tank the water is heated from the steam-coil B preparatory to being circulated through the several compartments of a building. The admission of steam to the coil B is controlled by the valve C. The valve C is actuated by a change of temperature of the water in the tank A. When the temperature of the water in the tank A is raised, the free end of a thermostat D is thrown outward toward the left, carrying with it the arm E and the spring F, whereby the valve G is moved from the valve-seat H, communicating with the duct 1, which in turn communicates with the chamber J.

The chamber J is provided with a piston K. It will be obvious that when the valve G is opened the water under pressure in the tank A will be caused to pass into the chamber J, whereby the piston K is forced downward, carrying with it the valve stem L whereby the valve C, which is affixed to the lower end of said stem, is closed and the further admission of steam to the tank A is out off. The admission of steam being thus stopped, the temperature of the water in the tank A is lowered, whereby the free arm of the thermostat D is caused to contract or bend inward toward the right, carrying with it the arm E, thus permitting the spring F and the valve G to be thrown toward the right, whereby the valve-seat H is closed and the further admission of Water to the chamber J from the tank A is cut off. It is obvious that, if desired, a diaphragm may be substituted for the piston K for actuating the valvestem L.

The chamber J is provided with an escapecock M, which is adjusted to permit the water therein to escape slowly. An expansionspring Nis locatedbetween the chambersupporting yoke O and the piston K, which spring is compressed by the action of said piston when forced downward, as previously described. The valve G being closed and the further admission of water to the chamber J being thereby stopped, the piston K is forced upward by the recoil of said spring N when the water above the piston in said chamber J escapes through the cock M, whereby the valve 0 is raised and the steam is again admitted to the coil B.

The cock M is so adjusted that the water will escape therefrom slowly, while the capacity of the duct I is so much greater than the cock M that when the valve G is open the excess of the water entering the chamber J over that which escapes through the cock M will promptly actuate the piston K in the manner described, while the escape of water from the cock M gradually releases the pressure of the water on the piston K as soon as the valve G is closed, thereby permitting said piston to be thrown upward by the action of the spring, as described, and the valve C to be gradually opened, whereby the admission of steam to the coil B is governed, as stated, to correspond with the temperature of the water heated by such coil.

The thermostat D is adjusted for maintaining the water in the tank A at a higher or lower temperature, as desired, by the handscrew P, which is connected with the thermostat by the ball-joint Q, pivotal joint R, and lever S, to which lever S one arm of the thermostat D is affixed. The thermostat D and lever S are supported from the walls of the chamber T by the lugs Uand pivotal bolt V. It will be obvious that by turning the handscrew P forward the arm S will be thrown inward toward the center of the chamber T, whereby the arm E will be caused to bear more forcibly against the spring F, whereby the thermostat D is caused to act more v promptly and whereby the valve G .is opened with a slighter rise of temperatureand ithe steam will be cut. off more promptly and the water in the tank A maintained at a lower temperature. When, however, it is desirous to maintain the water inthe tankat ahigher temperature, the hand screw P is turned slightly outward, whereby the action of the thermostat D is less prompt and a higher temperature will be reached before thevalve G is opened,and as a consequence the Water will be raised to a higher temperature in the tank A before thesteam-is cut off.

is an indicating-arm which is aflixed to the hand-screw l and turns with it.

A represents a circular index-plate which is provided with ordinary figures or characters (not shown) by which the proper adjustment of said arm W is indicated.

B" is an adjustable nntwvhich is threaded to the valve-rod L and bears upon the=upper end of the spiral spring N,wherel)y said spring N as it recoils acts against the under side of said not and forces said valve-rod andpiston upward as the water escapes fromthe chamber J. It will be obvious that thetension: and p'ower of said spring N-over said piston will be increased byt-urningsaid nut 13 down Ward against it and that thetensionof said spring will be diminished byturning said not upward.

For convenience of construction"the ther- 1n ostatis preferably located in-aseparateorsocalled secondary chamber T; which is connected with the tank A bya screw-threaded" joint 0. It is obvious, however, that said thermostat may, if desired, be-located within the tank A.

It is obvious that the piston-rod L' may be connected in an ordinary manner with-and used for controlling draft dues or dampers of furnaces instead of steam-controllingvalves.

Having thus described myinvention, what I claim as new,and desire to secu re by Letters Patent, is-

1. In a temperature-regulator for a hot-water heater the combination of a tankcontaining water under pressure, means for applyingheat to said tank, a cylinder having an exhaust-port always open communicating therewith, a communication between saidtankand said cylinder, said communication being ofa larger capacity than the said exhaust-port, means operated by variations in temperature of the water to open and close said communication, a piston located in said cylinder and operated in onedirectionby the pressure of the=watertinzsaid tank, and in the other direction by a spring or its equivalent, and means connected with said piston and operated thereby for governing the application of heat to said tank, substantially as specified.

2. Ina temperature-regulator for a hot-watel heater 'the combination of a tank containing water under pressure, a stea|n-c0il in said tank, a steamssupply pipe connected thereto, a valve in said steam-supply pipe controlling the admission of steam to said coil, a cylinder having anexhaust-port always open, a communication between said tank and said cylinder, said communication being of large capacity relatively to the said exhaust-port, means operated bythevariations in tempera to re of the water to open andclose said communication, a-piston located in said cylinder and operated in one direct-ionby the pressure of thewater w hen said communication is opened, means'foroperating thepistoninthe opposite directi'on whenthe'said communi-: cation is closed, and means operated by the movement of' said piston for openingand closing the valve inwsaidfisteaimpipe; substantially as specified.

3. In a temperature-regulator for a hOlJ-WQF ter 'heater the com bination of atanlteontainingwaterunder pressure,a steam-coil in said 1 tan k a steam-supply pipe connected thereto, a valve in said steam-supply pipe controlling; the admis'sion of steamto sai-d=='coil; an'outletport in said tank, a piston-chambercommu 9o nicating with-said tan k th'rough said outletport, anexhaust in. said piston chamber of small capacity'relative -tosaid outlet-port, a piston insaidchamber, means for raising said piston when said outlet-port in"said= tankis it closed, a-rod connectingsaid pistonwith said steanroontrollin g valve, avalve controlling said outlet-port in-said tank,*atherm0stat surrounded 'bythewater in said tank, and connections between said valve controlling said: outlet-portin said ta'nk and saidthermostat wherebysaid valve-is actuated to open'said i port when the temperature of-the water insaid tank risesand close said-p0rt \vhen said temperature falls; substantially as-described.

In testimony whereof I afiix my signaturein the presenceof two witnesses- W ALFRED ROESGH.

Witnesses:

FREDr HA DAVIS, HAROLD it FISH. 

